Long conversation last night about the project.
"Goldilocks and 3 Bears" concept, not too hot, not too cold, just right.
Some basics were that we'd try to do a very good "bang for the buck" porting job and valve job, without resorting to expensive heroic modifications.
There will be some slight amount of port filler(epoxy) used to correct the port bowl deformities.
Some unique valve seat angles have been developed to assist the flow, and this has so far added a pretty good amount of flow.
We ARE going to get those valves opened up a little further. We're looking at the 2 basic methods by which we can do that, and we'll see what shakes out. We are sending the cams in to be put on the Cam Doctor and analyzed, and then we'll see about doing something with them. We are lucky on this particular job to have a legendary cam grinder who is willing to look at this for us, and possibly do a grind.
We will be pursuing the 535cc route with a new piston, and doing as much as possible with the new piston to improve everything we can with it.
The big "IF" is all around the ECU for the EFI and the rev-limiter. This is the fly in the ointment.
I'm looking at ways to get into that thing, but if it is too difficult, I'm not ruling out a move to a carburetor.